<style>
    body{
        background-color: #e9ebee;
    }

    .header{
        background-color: #fff;
        color: #000 !important;
        box-shadow: 0 0px 5px rgba(0,0,0,.3);
        position: fixed;
        width: 100%;
        z-index: 99;
    }

    .header a{
        color: #000 !important;
    }
</style>

<ul class="layui-nav header">
    <li class="layui-nav-item">
        <a href="javascript:history.go(-1);"><i class="layui-icon">&#xe603;</i></a>
    </li>
    <li class="layui-nav-item title">
        全部订单
    </li>
    <li class="layui-nav-item fr">
        <a href="#">手机查单</a>
    </li>
</ul>
